SONAR PROCESS MONITORING SYSTEM SUPPLEMENT FOR ATEX CLASS I, ZONE 2 SAFETY
Table of Contents 1 2 SCOPE ................................................................................................................................... 1-1 MARKINGS............................................................................................................................. 2-1 2.1 Transmitter [TB8-xx-xx-xx-03] for use with Sensor Head [SH-xxx-xx-xA-xxx-03]:................2-1 2.2 Sensor Head [SH-xxx-xx-xA-xxx-03]: .....................................................................
10.1 Keep Enclosures Closed During Use..................................................................................10-1 10.1.1 Transmitter ..................................................................................................................10-1 10.1.2 Sensor Head ...............................................................................................................10-1 10.2 Periodic Inspections.........................................................................................
List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Control Drawings............................................................................................................. 5-1 Mains Power Connections .............................................................................................. 6-1 Customer I/O Connections.............................................................................................. 6-2 Fieldbus Connections............................................................
20909-01C Rev 04 Page iv
1 SCOPE This Class I, Zone 2 explosive gas location safety supplement includes the information mandated by EN60079-0:2006 and EN6007915:2005 for the ATEX Zone 2 certification of either of the following sets of equipment: 1) System comprised of Transmitter TB8-xx-xx-xx-03 with Sensor Head SH-xxx-xx-xA-xxx-03, or, 2) Transmitter TB8-xx-xx-xx-04 with separately certified sensor head (see appropriate separate manual for the separately certified Sensor Head).
2 MARKINGS The following explains the hazardous area markings that can be found on the equipment. 2.
The +100 ºC rating relates to the safety aspect only and is intended to include the effects of heating from the pipe on which it is mounted. To achieve good operating performance in addition to safety, the pipe can be at temperatures up to 100 ºC, but the air temperature in the vicinity of the pipe should be no greater than ~60 ºC.
3 ATEX ZONE 2 SPECIAL CONDITIONS OF USE RELATED TO THE SYMBOL “X” These Conditions of Use are those specifically identified by certain clauses in standards EN60079-0:2006 and EN 60079-15:2005 and are linked to the DEMKO certificate via the suffix “X” in the certificate number (DEMKO 07 ATEX 0608105X). 3.1 Transient Protection Provision shall be made external to the apparatus to prevent the rated voltage being exceeded by transient disturbance of more than 40%. 3.
4 STANDARDS See the CE Declaration of Conformity shipped with the sonar process monitoring system for the complete and up-to-date set of directives and standards to which this equipment complies.
5 CONTROL DRAWINGS The control drawings define how the Zone 2 hardware can be installed into hazardous areas.
6 SPECIFICATIONS 6.1 Electrical Parameters The mains power connections are made to the transmitter only. There is a DC-powered transmitter (TB8-xx-06-xx-xx) that requires 1836VDC at 25W max. There is an AC-powered transmitter (TB8-xx-05xx-xx) that requires 100-240VAC, 50-60Hz at 25W max. These signals can also be found in Table 2, below. Electrical parameters of other signals can be found in tables 3, 4, and 5. 6.
The following signals are not energy-limited for any of the transmitter models. Note: These signals are not present on every model. Some models may have one-piece screw terminal blocks and others may have two-piece pluggable terminal blocks with either screw or spring clip terminals. These terminals will accept 0.325 to 1.31 mm2 (22-16 AWG) conductor sizes.
The following signals are not energy-limited for any of the transmitter models. Note: These signals are not present on every model. Also, some models may have one-piece screw terminal blocks and others may have two-piece pluggable terminal blocks with either screw or spring clip terminals. These terminals will accept 0.325 to 1.31 mm2 (22-16 AWG) conductor sizes.
All of the following signals are energy-limited for the TB8-xx-xx-xx-03 transmitter only. For the TB8-xx-xx-xx-04 Transmitter they are not energy-limited. Note: These signals are not present on every model. Some models may have onepiece screw terminal blocks and others may have two-piece pluggable terminal blocks with either screw or spring clip terminals. These terminals will accept 0.325 to 1.31 mm2 (22-16 AWG) conductor sizes. Conductor size 0.52 mm2 (20AWG) or larger cross section is recommended.
7 OPERATING CONDITIONS UNDER WHICH THIS PRODUCT MAY BE SAFELY USED 7.1 Scope These are the criteria under which it is safe to install the ATEX Zone 2 rated products: The system comprised of: Transmitter TB8-xx-xx-xx-03 with Sensor Head SH-xxx-xx-xA-xxx-03, or The system comprised of: Standalone Transmitter TB8-xx-xx-xx-04 with separately certified sensor head 7.2 Hazardous Rating Location of Facility Where It Is To Be Installed 7.2.
rating of the enclosure. Refer to paragraph 8.3.1 for information on the selection of cable glands. 7.3 Installation Site Ambient Temperature, Pressure, Humidity 7.3.1 Temperature The transmitter (TB8-xx-xx-xx-03 or TB8-xx-xx-xx-04) must be installed in a location where the ambient temperature during operation will be within -20 ºC to +57 ºC. The sensor head (SH-xxx-xx-xA-xxx-03) must be installed in a location where the ambient temperature during operation will be within -40 ºC to +60 ºC.
condensation. Care should be taken during commissioning to verify that the electronics do not have accumulated condensed water or frost on them prior to powering them. 7.4 Water Spray and Dust Both transmitters (TB8-xx-xx-xx-03 or TB8-xx-xx-xx-04) and the sensor head (SH-xxx-xx-xA-xxx-03) are rated IP55. This means that they offer the next-to-highest degree of protection against dust and protection against low-pressure water jets (but not against high pressure jets or immersion).
7.7 Chemical Environment The materials used to construct the sonar process monitoring system are resistant to damage from chemicals expected in target applications. If there are any known chemical agents in the intended installation location that the installer believes may pose a special threat of chemical attack on metallic or non-metallic materials, please consult with Customer Support personnel prior to installation.
8 SUPPLEMENTARY INSTRUCTIONS FOR SAFE ASSEMBLY AND INSTALLATION 8.1 Use Control Drawing, Install Per Code Ensure installation is consistent with the requirements of the Control Drawing (see Annex B or C, depending on transmitter model number) and that the markings on the equipment are consistent with the classifications of the installation locations.
8.5 Wire Securely to Terminals and Route Neatly Refer to the Process Monitoring System Installation and Startup Manual for the proper wire insulation strip length for each terminal block. The proper strip length will be long enough to guarantee that the terminal grips the bare wire and not the insulation, yet short enough to minimize the risk of shorting exposed bare wires projecting from adjacent terminals.
9 SUPPLEMENTARY INSTRUCTIONS FOR SAFELY PUTTING INTO SERVICE 9.1 Prior to Applying Power Perform a final inspection of the installation. Use the installation instructions and the Control Drawing to aid in the inspection. Verify the absence of condensation or frost inside the enclosures. Verify the customer input / output connections are made properly and are connected to remote circuits operating within the allowed ranges of voltage and current (refer to Table 3).
10 SUPPLEMENTARY INSTRUCTIONS FOR SAFE USE (NORMAL OPERATION WITH NO OPERATOR INTERVENTION) 10.1 Keep Enclosures Closed During Use 10.1.1 Transmitter Verify the following: 10.1.2 The transmitter cover should be tightly closed and all 4 screws installed to secure the cover. Cable glands should be properly installed and snug in their mounting holes in the enclosure and snug around their cables. Cables shall be prevented from applying pulling or twisting forces on the cable glands.
10.2.2 Sensor Head Inspections Verify the absence of the following: 10.2.3 Loose or damaged latch hardware Loose or damaged boot seal clamps Damage to enclosure Damage to seals Loose or damaged access cover (including screws and seals) Loose handles Loose or damaged electrical connector or seals at the connector Evidence from the condition of the pipe that a pipe leak under the Sensor Head might occur before the next inspection (reference paragraph 7.6).
11 SUPPLEMENTARY INSTRUCTIONS FOR SAFE ADJUSTMENT 11.1 General Note: Making adjustments to the meter usually interrupts normal function of the meter and its outputs. If the meter is being used in a control loop, this can cause the loop to “open”. Inform Control Room Personnel that adjustments to the meter are going to be made to allow them to put the control loop into a manual mode of operation until adjustments are complete and the meter is ready to be brought back “on line” in the control loop. 11.
11.2.4 Use of DB9 RS232 Connector Interface This is a diagnostic interface and intended only for short-term infrequent use. The DB9 RS232 connector may only be used if the area is known to be free of explosive gas mixtures during the time immediately prior to, during, and after use of the RS232 interface to connect to a laptop computer for diagnostic purposes. 11.3 Sensor Head Adjustments In normal operation there are no adjustments that need to be made at the sensor head.
12 SUPPLEMENTARY INSTRUCTIONS FOR SAFE MAINTENANCE, SERVICING AND EMERGENCY REPAIR 12.1 General 12.1.1 UOS, OFF And No Explosive Gasses Present All maintenance, service, and repair should be performed with dead circuits and after testing to make sure that no explosive gas mixtures are present, unless otherwise stated (UOS). 12.1.2 Notify Control Room Note: In most cases, servicing will interrupt normal functioning of the meter and its outputs.
12.2.4 Sensor Terminal Blocks The Sensor Terminal blocks should be wired with the mains power OFF. This ensures that these signals are all de-powered. 12.2.5 Customer Input / Output and Fieldbus Terminal Blocks To the extent possible, ensure that the equipment on the far end of these lines is de-powered before servicing the associated terminal block connections. If unsure about whether the remote equipment is de-powered, ensure that no explosive gas mixtures are present before servicing. 12.2.
head cover can be removed from the pipe. Failure to do this will damage the sensor band. 12.3.4.2 Safety Procedure for Damaged Sensor Bands The sensor band should be removed from service and taken out of the hazardous area if it has mechanical damage. The damaged sensor band must be treated as a potentially incendive device – even when it is disconnected from a power source. The damaged sensor band should not be handled in or transported through any areas where explosive gas mixtures may be present.
13 SUPPLEMENTARY INSTRUCTIONS FOR SAFE DISASSEMBLY OR DISPOSAL 13.1 Most Warnings Same As For Maintenance Most warnings are the same as those in Supplementary Instructions for Safe Maintenance, Servicing, and Emergency Repair, in paragraph 12, above. Additions and modifications are described below. 13.2 General 13.2.1 Dead Circuits Power must be disconnected and testing performed to ensure that no explosive gas mixtures are present during disassembly and/or disposal 13.2.
14 TRAINING Contact CiDRA Customer Support for availability and scheduling of training courses.
15 CONTACT INFORMATION CiDRA Corporate Services 50 Barnes Park North Wallingford, Connecticut USA 06492 Telephone numbers 1-877-243-7277 203-265-0035 203-294-4211 Toll-free in US and Canada Elsewhere Fax Email: customersupport@cidra.
Annex A 20909-01C Rev 04 20885-01C, CERTIFICATION, CABLE GLAND, ZONE 2 Page A-1
20909-01C Rev 04 Page A-2
Annex B 20909-01C Rev 04 20907-01C, CONTROL DRAWING, SYSTEM, EEX, CLASS I, ZONE 2 Page B-1
20909-01C Rev 04 Page B-2
Annex C 20909-01C Rev 04 20908-01C, CONTROL DRAWING, TRANSMITTER, EEX, CLASS I, ZONE Page C-1
20909-01C Rev 04 Page C-2
